Normal Operation
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The ABS module receives brake pedal input from the PCM over the High Speed Controller Area Network (HS-CAN). The ABS module compares this information against other inputs (wheel speed signals, vehicle speed signal, brake pressure transducer) to determine if the brake pedal input is valid.
- DTC C0040:72 (Brake Pedal Switch "A": Actuator Stuck Open) - sets in continuous memory, if during normal operation, the ABS module cannot detect the brake pedal input or if the brake pedal input does not match information from other sensors (wheel speed signals, vehicle speed signal, brake pressure transducer).
- DTC C0040:73 (Brake Pedal Switch "A": Actuator Stuck Closed) - sets in continuous memory when the ABS module senses vehicle speed and acceleration while the brake pedal input is indicating that the vehicle brakes are applied.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals, or connectors
- Stoplamp switch